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Microsleeps are associated with stage-2 sleep spindles from hippocampal-temporal network
Jonmohamadi, Yaqub Poudel, Govinda Innes, Carrie C. R. H. Jones, Richard
Jonmohamadi, Yaqub
Poudel, Govinda
Innes, Carrie C. R. H.
Jones, Richard
Abstract
Behavioral microsleeps are associated with complete disruption of responsiveness for ∼0.5s to 15s. They can result in injury or death, especially in transport and military sectors. In this study, EEGs were obtained from five nonsleep-deprived healthy male subjects performing a 1h 2D tracking task. Microsleeps were detected in all subjects. Microsleep-related activities in the EEG were detected, characterized, separated from eye closure-related activity, and, via source-space-independent component analysis and power analysis, the associated sources were localized in the brain. Microsleeps were often, but not always, found to be associated with strong alpha-band spindles originating bilaterally from the anterior temporal gyri and hippocampi. Similarly, theta-related activity was identified as originating bilaterally from the frontal-orbital cortex. The alpha spindles were similar to sleep spindles in terms of frequency, duration, and amplitude-profile, indicating that microsleeps are equivalent to brief instances of Stage-2 sleep.
Keywords
Beamformer, EEG, ICA, localization, microsleeps, sleep spindles, hippocampi, temporal lobes
Date
2016
Type
Journal article
Journal
International Journal of Neural Systems
Book
Volume
26
Issue
4
Page Range
1-12
Article Number
ACU Department
Mary MacKillop Institute for Health Research
Faculty of Health Sciences
Faculty of Health Sciences
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Event URL
Open Access Status
License
File Access
Controlled